Using the point M_b and the point T_b, construct a line b (rule W02);

% DET: points M_b and T_b are not the same

Using the point M_b and the line b, construct a line m_b (rule W10b);

Choose freely a point O on the line m_b (rule WOnline2)

Choose freely a point A on the line b (rule WOnline1)

Using the point A and the point M_b, construct a point C (rule W01);

Using the point A and the point O, construct a circle k(O,C) (rule W06);

% NDG: points A and O are not the same

Using the circle k(O,C) and the line m_b, construct a point N_b and a point N_bk (rule W04);

% NDG: line m_b and circle k(O,C) intersect

Using the point N_b and the point T_b, construct a line s_b (rule W02);

% DET: points N_b and T_b are not the same

Using the circle k(O,C), the line s_b, the point O and the point N_b, construct a point B (rule W05);

% NDG: line s_b and circle k(O,C) intersect

% DET: points N_b and B must be different